Osteogenic differentiation of mouse embryonic stem cells and mouse embryonic fibroblasts in a three-dimensional self-assembling peptide scaffold

被引:120
作者
Garreta, Elena
Genove, Elsa
Borros, Salvador
Semino, Carlos E.
机构
[1] MIT, Ctr Biomed Engn, Cambridge, MA 02139 USA
[2] Univ Ramon Llull, Inst Quim Sarria, Barcelona Bioengn Ctr, Barcelona, Spain
来源
TISSUE ENGINEERING | 2006年 / 12卷 / 08期
关键词
D O I
10.1089/ten.2006.12.2215
中图分类号
Q813 [细胞工程];
学科分类号
摘要
In the present work, we studied the differentiation capacity of mouse embryonic stem cells (mESCs) and mouse embryonic fibroblasts (MEFs) to differentiate into osteoblast-like cells in a 3-dimensional (3D) self-assembling peptide scaffold, a synthetic nanofiber biomaterial with potential applications in regenerative medicine. We demonstrated that 2D and 3D systems promoted differentiation of mESCs into cells with an osteoblast-like phenotype consisting of osteopontin and collagen I marker expression, as well as high alkaline phosphatase (ALP) activity and calcium phosphate deposits. In 3D cultures the frequency of appearance of embryonic stem cell-like colonies was substantially greater, suggesting that the 3D microenvironment promoted the generation a stem cell-like niche that allows undifferentiated stem cell maintenance. On the other hand, after MEFs were cultures in the 3D system with their regular growth medium, but not in the 2D system, they expressed osteopontin, up-regulated metalloproteinase activities, and they acquired a distinct phenotype consisting of small, elongated cells with remaining mitotic-activity. Furthermore, only 3D MEF cultures underwent osteoblast differentiation after osteogenic induction, based on matrix mineralization, collagen I synthesis, ALP activity, and expression of the osteoblast transcription factor Runx2, suggesting that the 3D environment promotes differentiation of MEFs into osteoblast-like cells. We propose that the 3D system provides a unique microenvironment that promotes differentiation of mESCs and MEFs into osteoblast-like cells.
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页码:2215 / 2227
页数:13
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